London:Siebe, Gorman and Co., Ltd. 1955. Sixth edition, revised. xv+693pp+(17)pp index. Illustrated. Hardcover with dust jacket. Aside from some light soiling to page edges, a very good, clean copy. No previous owners marks or signatures. The binding is tight and hinges intact. The dust jacket is still in one piece but soiled, with wear to edges and seams including chips and tears.